Micronaut success stories

Real teams use Micronaut for serverless APIs, Grails migrations, workflow orchestration, IoT microservices, event platforms, legacy tool upgrades, and SaaS backends.

API performance

Serverless API performance

Sonar uses Micronaut with AWS Lambda SnapStart and CRaC-oriented lifecycle support.

Challenge

Keep Lambda-based services responsive while coordinating startup work, static analysis, and production lifecycle behavior.

Micronaut fit

Micronaut provides the HTTP/API foundation and works with SnapStart and CRaC-oriented lifecycle hooks.

Outcome

A production story around serverless readiness, snapshotting, and Micronaut code-quality analysis.

AWS LambdaSnapStartCRaCSonarQube

Grails migration

Grails-to-Micronaut migration

Agorapulse moved a large Grails codebase toward Micronaut while running serverless functions and backend applications.

Challenge

Modernize a mature Grails estate without stopping active serverless and backend application development.

Micronaut fit

Micronaut supports the migration path across Lambda functions, backend services, and shared open-source libraries.

Outcome

A mixed estate with more than 100 serverless functions, more than 50 server applications, and reusable Micronaut libraries.

GrailsAWS LambdaServerlessMicronaut Libraries

Workflow orchestration

Workflow orchestration platform

Kestra uses Micronaut for REST APIs, HTTP clients, OpenAPI generation, cloud readiness, and reactive workloads.

Challenge

Build a modular orchestration service with REST APIs, generated contracts, observability, streaming logs, and plugin extension points.

Micronaut fit

Micronaut powers APIs, HTTP clients, OpenAPI generation, probes, configuration, reactive workloads, and SSE log streaming.

Outcome

A cloud-ready orchestration platform with modular services and a large plugin ecosystem.

REST APIsOpenAPIKubernetesSSE

IoT microservices

IoT monolith modernization

Samsung SmartThings moved from a legacy monolith toward a lightweight Micronaut microservices system.

Challenge

Move smart-home services away from a legacy monolith while preserving responsiveness at connected-device scale.

Micronaut fit

Micronaut supports lightweight microservices, faster tests, and cloud-efficient runtime behavior.

Outcome

A microservices direction for hundreds of services with sub-second operation goals and better delivery ergonomics.

IoTMicroservicesTestingCloud

Virtual events

Rapid virtual-event platform

CSS and Object Computing built a secure virtual conference platform on AWS with Micronaut in four weeks.

Challenge

Replace in-person conference workflows with secure virtual matchmaking and conference delivery under a compressed deadline.

Micronaut fit

Micronaut backed a fast AWS delivery path for event workflows and application services.

Outcome

A secure virtual conference platform delivered in four weeks.

AWSVirtual EventsSecurityMatchmaking

Microservices upgrade

Legacy tool replacement

A manufacturing organization replaced an obsolete legacy tool with a Micronaut-backed microservice solution in four weeks.

Challenge

Replace an obsolete engineering tool with a modern service while keeping downtime low and interactions fast.

Micronaut fit

A Netty-backed Micronaut server handled JSON communication for a lean SPA.

Outcome

A microservice upgrade delivered in four weeks with sub-second interactions and short deployment downtime.

NettyJSONSPAMicroservices

Serverless SaaS

Serverless SaaS backend

Caribou combined Micronaut, GraalVM, Kotlin, and AWS Lambda to reduce cold-start pressure for a SaaS backend.

Challenge

Keep a SaaS REST API productive while reducing Lambda cold-start pressure and supporting GitHub integration.

Micronaut fit

Micronaut combines Kotlin, fast testing, Swagger/OpenAPI support, and GraalVM native images for the backend.

Outcome

A productive serverless SaaS architecture built around Micronaut, GraalVM, Kotlin, and AWS Lambda.

GraalVMKotlinAWS LambdaSwagger